animal Figure, being not so quickly dissolved, the animal motions are not so soon altered, (for the dissolving of the Figure is nothing else but an alteration of its Motions;) and this dissolution is not done in an instant of time, but by degrees: But yet I must confess, it is not a common action in Nature, for Nature hath both common, and singular or particular actions: As for example, Madness, natural Folly, and many the like, are but in some particular persons; for if those actions were general, and common, then all, or most men would be either mad, or fools, but, though there are too many already, yet all men are not so; and so some murthered bodies may bleed or express some alterations at the presence of the Murtherer, but I do not believe, that all do so; for surely in many, not any alteration will be perceived, and others will have the same alterations without the presence of the Murtherer. And thus you see, _Madam_, that this is done naturally, without the help of the Devil; nay, your _Author_ doth himself confess it to be so; for, says he, _The act of the Witch is plainly Natural; onely the stirring up of the vertue or power in the Witch comes from Satan._ But I cannot understand what your _Author_ means, by the departing of spiritual rays from the Witch into Man, or any other animal, which she intends to kill or hurt; nor how Spirits wander about in the Air, and have their mansions there; for men may talk as well of impossibilities, as of such things which are not composed of Natural Matter: If man were an Incorporeal Spirit himself, he might, perhaps, sooner conceive the essence of a Spirit, as being of the same Nature; but as long as he is material, and composed of Natural Matter, he might as well pretend to know the Essence of God, as of an Incorporeal Spirit. Truly, I must confess, I have had some fancies oftentimes of such pure and subtil substances, purer and subtiler then the Sky or Æthereal substance is, whereof I have spoken in my Poetical Works; but these substances, which I conceived within my fancy, were material, and had bodies, though never so small and subtil; for I was never able to conceive a substance abstracted from all Matter, for even Fancy it self is material, and all Thoughts and Conceptions are made by the rational Matter, and so are those which Philosophers call Animal Spirits, but a material Fancy cannot produce immaterial effects, that is, Ideas of Incorporeal Spirits: And this was the cause that in the first impression of my _Philosophical Opinions_, I named the sensitive and rational Matter, sensitive and rational Spirits, because of its subtilty, activity and agility; not that I thought them to be immaterial, but material Spirits: but since Spirits are commonly taken to be immaterial, and Spirit and Body are counted opposite to one another, to prevent a misapprehension in the thoughts of my Readers, as if I meant Incorporeal Spirits, I altered this expression in the last Edition, and